Superheater.



UNTTED STATES PATENT OFFICE.

FRANCIS Nt POIGNAN'D, 0F RUTHERFOBD, NEW JJERSEY, ASSIGNOR T0 LOCOMOTIVEBUPERHEATEB COMPANY', 0F NEW YORK, N. Y., A. CORPORATION 0F DELAWARE.

Patented Mal. 26, 1918.

sUPnnHnATEn..

1,260,443, specification of Letters raient.

Application led December 22, 1917. Serial No. 208,471.

To all 'whom it may concern.'

in is a specification.

Be it known that I, FRANCIS Nnsnrr'r PomNAND a subject of the Kin ofEngland, residing at Rutherford, in t` e county of Bergen and StateofNew Jersey, have invented certain new and useful Im rovements inSuper-heaters, of which the ollowy invention relates to superheaters,and more particularly to superheaters of the tipe wherein the tubularunits making up t e superheater are located in the dues or tubes of aboiler. The ends of the units of this type of superheater are secured toa header or headers, and various ways of se"- curing them have beenproposed. .The present invention has for its purpose the provision ofimproved means of establishing connection between the units and theheader. This statement of purpose is to be'taken in its broadest sense,as covering a 'modification or rearrangement of the unit which ma/become necessaxl.

he invention is lly described in the following specification which is tobe read in connection with the accomranying drawings forming 'parthereof. o n these drawings, Figure 1 is a sectional view of the frontart of a locomotive boiler, on line 1-1 ci) Fig. 2, lookin in thedirection indicated b the arrows; ig. 2 is a view on line 2 2 o Fig. 1,in the direction of the arrows; Fig. 3 is a section, on an enlargedscale, on line 3-3 of Fig. 2; Fig. 4 is a section of Fig. 3 on line 4 4.Fig. 5 is a fragmentary sectional view on line 5-5 of Fig. 1 thesubheader being raised off its seat; Figs.` 6 to 9 are sectional views,similar to Figs. 3 and 4, of modifications; Figs. 10 to 13 are-sectionalviews similar to Figs. 1 and 2 of odifications, the views being takenrespec vel *on lines lll-10, 11-11, 1212, and 134- 3; Fig. 14 is a frontview, part of it in 'section on line 1'1-14 of Fig. 15,v and parts beingomitted, of a marinel 'supeiheater accordin to m invention; Fig. 15 is atop view o same, t e dues being shown in central longitudinal section;Figs. 16 and 17 show views, similar to Figs. 14 and 15 of amodileatioln; Fi 18 is a section on line 18-18 ofllfig. 19; ig. 19Ais anenlar ed top'view of tw; the subheaders of ig.

16; Figs. 20 and 21 are sectional views on lines 20-20 and 21-21respectively of Fi. 16.

eferring first to the form of my device shown in Figs. 1 and 2,reference numeral 1 designates the boiler, 2 the Hue sheet, 3 thefilles, and 4 the superheater units. These units, it will be noted, havein the case shown two loops each, looping into separate iues, each. iiueaccommodating two loops, but of different units. The ends of these unitsare welded or otherwise secured into the openings 5 of the subheader 6(see Figs. 3 and 4). The openings 5 into which the ends of any one unitare secured lie on opposite sides of the partition 7 in subheader 6.Each subheader 6 is secured to the header 8 `bly means of its bolt 9,which passes throng the partition 7 and is screwed into wall 10 ofheader 8. This wall 10 divides header 8 into two compartments 11 and 12,into one of which, 11, steam is delivered from the boiler, and from theother 12, of which it is carried to the engine. The subheader 6 is keptin such position, by means of the lugs 13 on it and 14 on the header,relative to the header 8 that the two partitions 7 and 10 are always inalinement. The seat between the subheader 6 and the header 8 isspherical, so that a slight movement between the two is possible withouta leak resulting.

As will be clear from Fig. 2, the header? is divided into two branches.Only one o these is shown, the other being symmetrical with it. Thereare shown four subheaders 6 attached to the branch shown nd four unitsto each subheader, though lvli ently either or both of these arrangeme'may be varied.V

Figs. 6 and 7 show a variation of the means for securing the subheaders.Instead of the single bolt 9, two bolts 9 and 9b, on o posite sides ofthe subheaders are em p oyed. They pass through ears 15 and are screwedinto the header wall. Luge 13 and 14 are then superiuous.

A still dili'erent means of attachment is shown in Figs. 8 and 9. Here aclamp 16 lies across the outer end of the subheader, and bolts 9 and 9dpass through it near its opposite ends and are screwed into the headerTwall. Pins 17, integral with the subheader, and engaging withcorresponding openingsl in clamp 1G. keep the snbheadcr from rotating. 5The operation of the device falls for no lengthy statement, but will beevident. to any one familiar with this art. Saturated steam from theboiler is delivered into chamber 11 of header 8. From this chamber itflows to the chambers of the several subheaders in communication withchamber 11. It leaves these by one set of the openings 5 and flowsthrough the super-heater units 4, Where 1t is superheatcd by the hotgases flowing 15 through the fines 3, returning to the other chambers ofthe subhcaders, e. those coinmunicating with the chamber 1Q ol" header8. From 179. the steam is carried to the point where it isv to be used.

In the form of the device illustratedin 'Figs 10 and 11, theconnectionsby which stcam is carried from chamber 12 of the header 8 are made atthe top, instead of at the bottom as in the first form, and instead oftwo branches, header 8 has four, two only ot' which are shown. Thenumber of units connected with each subheader is half as `great as inthe first form; otherwise this modification calls for no furtherdesemption.

Figs. 12 and 13 show a form for Ause 1n small boilers, where only asmall number of. lines are to be supplied with units. is a single branchto the header in this case, and two subheaders on each side of it, eachwith four units supplying four flues. The details of the snbheaders, andthe action of the apparatus will be evident from what was said above.

The forms of the device so far described are intended particularly foruseJ with boilers of the locomotive type; the forms of Figs. 14 to 17are for use in return tubular boilers such as are used particularly inmarine work. In these eases the flues used are customarily smallerandonly one loop of a unit is put into eaeh flue.

The header of Figs, 14 and 15 has two chambers separated by the wall 18,one of the chambersl for saturated steam to be delivered to the units,the other to receive the .aiperheated steam from the units. The twochambers are. seen to have intel-meshing portions. 19 and t, and it iswith two such adjacent portions that each subheader coinmunicates. 'lhemethod shown in this figurel for attaching the subite-aders is a littledifferent. from those tlescribed before. The clamps' Qt hear on the topsoi? two adjacent 50 sublieath-rs and are held by central bolts '/'lhccadihemlerf` have the central partition as before, which here seats onthe Wall between spares I9 and 2t).

Inl the.4 modification of Figs. 16 to 21,

Theresaturated steam. is admitted at the nozzle and superhcated steamleaves at 24. The spaces 25 and Q6 eonin'uilnicate freely with space Q7,n hile the spaces '28 and 29 are in free comniunieation with space 30;but 25 and 2li do not directly open into 30, nor do 28 and 29 opendirectly into 27. `The subheadersv eat-h roxmnunicate with one space 25or 2U and an adjacent space 28 or 29, their partition wall registeringwith the correspending partition wall in the header. The connection olEthe units corres Onds with that in the previously describe cases; andthe operation of this form of the apparatus will be obvious.

It will be clear that the above described forms of my apparatus merelyillustrate In invention, and that there are numerous variations andmodifications possible. These, in as far as they are within the spiritof the subjoined claims, I regard as part of my invention. I.

What I claim is 1. In apparatus of the class described, a header havinga partition wall and an opening divided by said partition wall, asubheader of cylindrical shape having a. diametrical partition wall,said subheader being closed at one end and open at the other, a boltpassing longitudinally through the partition wall of the subheader andscrewed into the partition Wall of the header and holding` the subheaderto the header, the two partition walls registering, the engagingsurfaces of the header and subheader being spherical.

2. In apparatus of the class described, the combination of a headerhavin a partition wall and a circular opening iametrically dividel bysaid wall; a, cylindrical subheade having a diametrical partition Wall,means to hold said subheader to said header in such position that thetwo partition walls register. the contacting points of the header andsublieader and their. partition walls l ing in a spherical surface,allowing sli t angular movements of the Subheader 1', ntive to theheader.

3. l'n apparatus of the class described, the combination of a headerhaving a partition wall and a circular opening diametrieally divided bysaid wall, a cylindrical subheader having a diametrical partition walland having one end closed and the other open, a single bolt holding theheader to the snhheader in such position that the partition wallsregister, the contacting points of the header and subheader and theirpartition walls lying in a s, 'e'f'ieal surface, a superheater unitsecured to the. subheader its ends opening respectively into the twochambers o1 the subheader.

4. In apparatus of the Yclass described, the combination of a. header,a, partition means wall in said header, the header having a circularopening bisected by said partition wall, a cylindrical subheader with apartition bisecting it diametrically,thesubheader 5 being ,openat oneend and closed atthe other, means to hold the header and subheader inengagement'in such 'manner that th partition Walls register and theinterior spaces on the two sides of the subheader partition communicaterespectively with the'two spaces in the header, the contacting points ofthe header, subheader and partitions lying in a spherical surface, and aplurality of superheater units, one end of each heinz; Welded into andopenin into one of the spaces in the subheader, t e other end beingWelded into and opening into the other.

FRANCIS N. POIGNAND.

